We're having problem with a video stream we are distrubuting to a few users. Lately we got a lot of complaits regarding glitches/freezing in the video.
Hardware in 7600's: WS-X6704-10GE
Incomming stream<<--port channel 2G Fiber-->>7600(SUP720)<<--10G fiber-->>7600(RSP720 SVI for video)<<--10G fiber-->> Switch<<-1G RJ45->>PC
- I've checked the interfaces on the 7600's but cant see any errors on the interfaces or output drops on the interfaces(no congestion?)
- We're seeing TX drops from the edge switch to the pc's. Investegating the cause with vendor. But my guess can be buffer problem going from 10G to 1G?
- We have not implemented any Qos on the 7600's however we have enabled qos to prioritize the video vlan on the edge switch.
- Peak traffic between 7600 and edge switch is about 1G(5min average)
- Would enabling QoS on the 7600 and do End to End Qos solve the problem? As far I understand qos will only help if the interface is congested which isn't the case here?
- What would be the best strategy for video streaming? Would the solution be to use the CBWFQ + LLQ for this kind of traffic or would LLQ starve the rest of the queue's?
Could you provide the qos and port configuration + show interfaces" from edge switch (if not Cisco - try to replace with Cisco for clarity)?
LLQ is good if you limit the amount of traffic it may allocate on the interface.
PS: what is the video stream bandwidth and packet rate?